packages/linux/ixp4xx-kernel/2.6.16/70-artop-latency.patch


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---
 drivers/scsi/pata_artop.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- linux-ixp4xx.orig/drivers/scsi/pata_artop.c	2006-02-21 02:05:33.000000000 +0100
+++ linux-ixp4xx/drivers/scsi/pata_artop.c	2006-02-21 02:49:47.000000000 +0100
@@ -450,6 +450,14 @@ static int artop_init_one (struct pci_de
 		pci_read_config_byte(pdev, 0x49, &reg);		   
 		pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
 
+		/* PCI latency must be > 0x80 for burst mode, tweak it
+		 * if required.
+		 */
+		pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
+		if (reg <= 0x80)
+			pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
+
+
 		/* Enable IRQ output and burst mode */
 		pci_read_config_byte(pdev, 0x4a, &reg);
 		pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);